438330 has 32 divisors (see below), whose sum is σ = 1108800. Its totient is φ = 110592.

The previous prime is 438329. The next prime is 438341. The reversal of 438330 is 33834.

It is a Curzon number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 438297 and 438306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (34650).

2⁴³⁸³³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554400).

438330 is an abundant number, since it is smaller than the sum of its proper divisors (670470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438330 is a wasteful number, since it uses less digits than its factorization.

438330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 438330 is about 662.0649514965. The cubic root of 438330 is about 75.9627009958.

Subtracting from 438330 its reverse (33834), we obtain a square (404496 = 636²).

The spelling of 438330 in words is "four hundred thirty-eight thousand, three hundred thirty".